17. Extract the Nibble from an 8-bit Register

#include <stdio.h>
#include <stdint.h>

unsigned char extractNibble(unsigned char reg, int pos) {
   
    unsigned char nibble = (reg >> (pos * 4)) & 0x0F;
    return nibble; 
}

int main() {
    unsigned char reg;
    int pos;
    scanf("%hhu %d", &reg, &pos);

    printf("%d", extractNibble(reg, pos));
    return 0;
}